48 BULLETIN 99, UNITED STATES NATIONAL MUSEUM. 
to be covered by Article 28, and no further official ruling is neces- 
sary—‘‘If the names are of the same date, that selected by the first 
reviser shall stand.”’ 
In this particular case I am not yet ready to believe, however, 
that Choiropotamus Gray, 1843, should be accepted in any other 
light than as a lapsus for Koiropotamus in the same work. The 
absolute proof that Gray derived his generic name from one of the 
names of the type-species of the genus, Sus koiropotamus Desmoulins, 
1831, may be wanting; but that he did that very thing, as was com- 
mon practice, is reasonable to assume.' No error of transcription, 
lapsus calami, nor typographical error can then be admitted in the 
case; and the name is not subject to emendation. 
KOIROPOTAMUS KOIROPOTAMUS DAEMONIS (Major). 
1892. Potamocherus africanus TRUE, Proc. U.S. Nat. Mus., vol. 15, p. 479. Octoe 
ber 26. (Not of Schreber.) 
1897. Potamocherus cheropotamus demonis Masor, Proc. Zool. Soc. London, 
1897, p. 367. (Mount Kilimanjaro, East Africa; type in British Museum.) 
1910. Potamocherus cheropotamus demonis Rooszeve tt, African Game Trails, 
Amer. ed., p. 475; London ed., p. 486. (Part.) 
1914. Potamocherus koiropotamus demonis RoosevELT AND Heturr, Life-Hist. 
African Game Anim., vol. 1, p. 273. (Part.) 
Specimens.—Two, from localities as follows: 
British East Arrica: Voi, 1 skull (Percival). 
GrerRMAN East Arrica: Mount Kilimanjaro, 1 skin (Abbott). 
The skull from Voi was presented by Mr. A. B. Percival to Doctor 
Mearns at the time of the Smithsonian African Expedition. 
Although apparently a common animal in much of the country 
covered by our expeditions, the bush pig is rarely collected. It is 
said to be seldom seen because of its nocturnal habits and retiring 
disposition. The material at hand is inadequate for me to judge 
with any degree of certainty the validity of the named races, and the 
various specimens are placed with the forms with which they should 
belong for geographical reasons alone. The specimen collected by 
Doctor Abbott on Kilimanjaro, a topotype of K. k. demonis, is the 
skin only of a female; the body is reddish with an admixture of 
black and the head and dorsal mane are whitish. The skull from 
Voi, evidently also a female, adult but with m* not worn, measures: 
Occipitonasal length, 338; parietal width, 39; greatest width lambdoid 
crest, 76; zygomatic width, 158; width postorbital processes, 104; 
interorbital width, 74; width of palate at m?, 30; upper tooth row, 
113; length of m, 32. 
1 In his paper proposing the new name Polamocherus as a substitute for Koiropotamus and Choiropotamus 
Gray cites in his synonymy from his 1843 work only Koiropotamus and cites Choiropotamus from his paper 
in the Annals and Magazine for 1852. At the same time he cites in his specific synonymy ‘‘ Sus koiropotamus 
Des Moul. Dict. Class. H. N. Atlas, t. 79.” 
